Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 53, NWS Austin/San Antonio, TX

May 2, 2003Llano County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 2, 2003, 11:45 PM CDT for Llano County, Texas. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 2, 2003, 11:45 PM CDT (04:45 UTC)
Expired: May 3, 2003, 12:45 AM CDT
In force: 60 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Llano County, TX

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.8 hours before the alert went out and 256 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2747 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 846 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 3.2
Supercell composite: 12.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KEWX 030445
SVRSAT
TXC299-030545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1145 PM CDT FRI MAY 2 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  LLANO

* UNTIL 1245 AM CDT

* AT 1145 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 14 MILES NORTH OF LLANO...MOVING SOUTHEAST AT
  20 MPH.

* THIS WARNING INCLUDES LOCATIONS IN AND AROUND...
  BUCHANAN DAM
  KINGSLAND

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.


LAT...LON 3091 9846 3084 9838 3076 9843 3074 9838
          3067 9844 3062 9841 3052 9861 3092 9875

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 2, 9:10 PM CDT, 2 hours 35 minutes earlier.

Area forecast discussion, May 2, 9:10 PM CDT, 2 hours 35 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
910 PM CDT FRI MAY 2 2003

UPDATED FORECAST TO KNOCK DOWN 1ST PERIOD POPS SIGNIFICANTLY BASED
ON CURRENT RADAR AND SATELLITE TRENDS. CANCELLED SEVERE THUNDERSTORM
WATCH #213 AS WELL...GIVEN RAPIDLY DECREASING SURFACE-BASED
INSTABILITY. NEW SUITE OF TEXT PRODUCTS OUT SHORTLY.

11/01/WR

.EWX...NONE.

Hazardous weather outlook, May 2, 2:58 PM CDT, 8 hours 47 minutes before

TXZ171>173-183>194-202>209-217>225-228-031100-

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
258 PM CDT FRI MAY 2 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING ALONG
AND NORTHEAST OF A CUERO TO SAN ANTONIO TO ROCKSPRINGS LINE.
THUNDERSTORMS WILL DEVELOP OVER CENTRAL TEXAS ALONG A COOL FRONT AND
DRYLINE THIS AFTERNOON AND THEN MOVE SOUTHEAST INTO THE HILL COUNTRY
AND SOUTH CENTRAL TEXAS DURING THE EVENING.

LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS WITH ISOLATED
TORNADOES AND LOCALLY HEAVY RAINFALL POSSIBLE.  THE GREATEST THREAT
OF SEVERE STORMS WILL BE ALONG AND NORTHEAST OF A LA GRANGE TO SAN
MARCOS TO HARPER LINE.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED LATE THIS AFTERNOON OR EVENING IN
THE SLIGHT RISK AREA.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
THERE IS A CHANCE OF THUNDERSTORMS FOR VAL VERDE AND EDWARDS COUNTIES
MONDAY EVENING AND ALL OF THE HILL COUNTRY AND SOUTH CENTRAL TEXAS
TUESDAY THROUGH THURSDAY.  THE STRONGEST STORMS CAN BE EXPECTED
WEDNESDAY AFTERNOON AND EVENING ACROSS THE WESTERN HILL COUNTRY AND
VAL VERDE COUNTY.

OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

In the hours before

Local storm report, May 2, 7:09 PM CDT, 4 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
709 PM CDT FRI MAY 2 2003

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0637 PM    10NW LLANO                TX   1.00 INCH HAIL
05/02/03   LLANO                          REPORTED BY CO-OP
                                          OBSERVERS

0705 PM    LLANO                     TX   .75 INCH HAIL
05/02/03   LLANO                          REPORTED BY LAW
                                          ENFORCEMENT

CA

Local storm report, May 2, 7:23 PM CDT, 4 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
723 PM CDT FRI MAY 2 2003

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0637 PM    10NW LLANO                TX   1.00 INCH HAIL
05/02/03   LLANO                          REPORTED BY CO-OP
                                          OBSERVERS

0705 PM    LLANO                     TX   .75 INCH HAIL
05/02/03   LLANO                          REPORTED BY LAW
                                          ENFORCEMENT

0655 PM    3NW LLANO                 TX   1.75 INCH HAIL 05/02/03
           LLANO                          REPORTED BY SPOTTER

CA

Special weather statement, May 2, 9:01 PM CDT, 2 hours 44 minutes before

TXZ171>173-188-190-192-030200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
901 PM CDT FRI MAY 2 2003

SEVERE THUNDERSTORM WATCH #213 THAT WAS IN EFFECT FOR...BURNET...
LLANO...WILLIAMSON...TRAVIS...GILLESPIE AND BLANCO COUNTIES... HAS
BEEN CANCELLED.

ONLY ISOLATED SHOWERS AND THUNDERSTORMS CONTINUE IN THE FORECAST
TONIGHT...WITH EXISTING ACTIVITY ON THE DOWN TREND.

Nearby

Severe Thunderstorm Warnings in Texas, 2003 Every severe thunderstorm warning in 2003

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.